Cranks, shafts, and spruce trees.

mods/rgt_things/rgt_lights/init.lua

@@ -0,0 +1,92 @@
+
+local lantern_box = {
+    type = "fixed",
+    fixed = {
+        {
+            -3/16, -0.5, -3/16,
+            3/16, -1/16, 3/16,
+        },
+        {
+            -2/16, -1/16, -2/16,
+            2/16, 1/16, 2/16
+        },
+        {
+            -1/16, 1/16, -1/16,
+            1/16, 3/16, 1/16
+        }
+    }
+}
+
+local hanging_lantern_box = {
+    type = "fixed",
+    fixed = {
+        {
+            -3/16, -7/16, -3/16,
+            3/16, 0, 3/16,
+        },
+        {
+            -2/16, 0, -2/16,
+            2/16, 2/16, 2/16
+        },
+        {
+            -1/16, 1/16, -1/16,
+            1/16, 0.5, 1/16
+        }
+    }
+}
+
+function rgt.register_lantern(type)
+    local function on_place(s, p, pt)
+        local out = ItemStack(s)
+        local target = minetest.registered_nodes[minetest.get_node(pt.under).name].buildable_to and pt.under or pt.above
+        local below = minetest.get_node(target:offset(0, -1, 0))
+        
+        -- TODO: Check solidity, not just air-ness.
+        if below.name == "air" then
+            local above = minetest.get_node(target:offset(0, 1, 0))
+            
+            if above.name == "air" then
+                return s
+            end
+            
+            s:set_name("lantern_"..type.."_hanging")
+        else
+            s:set_name("lantern_"..type)
+        end
+
+        local stack = minetest.item_place_node(s, p, pt)
+        out:set_count(stack:get_count())
+        
+        return out
+    end
+    
+    rgt.register_node("lantern_"..type, {
+        drawtype = "mesh",
+        mesh = "rgt_lantern.gltf",
+        tiles = {"rgt_lantern_"..type..".png"},
+        paramtype = "light",
+        light_source = 11,
+        selection_box = lantern_box,
+        collision_box = lantern_box,
+        node_placement_prediction = "",
+        groups = {dig_immediate = 3},
+        on_place = on_place
+    })
+    
+    rgt.register_node("lantern_"..type.."_hanging", {
+        drawtype = "mesh",
+        mesh = "rgt_lantern_hanging.gltf",
+        tiles = {"rgt_lantern_"..type..".png"},
+        paramtype = "light",
+        light_source = 11,
+        selection_box = hanging_lantern_box,
+        collision_box = hanging_lantern_box,
+        node_placement_prediction = "",
+        drop = "lantern_"..type,
+        groups = {dig_immediate = 3},
+        on_place = on_place
+    })
+end
+
+rgt.register_lantern("iron")
+rgt.register_lantern("copper")

mods/rgt_things/rgt_lights/mod.conf

@@ -0,0 +1,2 @@
+name = rgt_lights
+depends = rgt_world